Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended				12 Months Ended		12 Months Ended			12 Months Ended
	Mar. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2013 Forecast [Member]	Dec. 31, 2012 Federal [Member]	Dec. 31, 2012 State [Member]	Dec. 31, 2012 Foreign [Member]	Dec. 31, 2011 Foreign [Member]	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Minimum [Member] State [Member]	Dec. 31, 2012 Minimum [Member] Foreign [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Maximum [Member] State [Member]	Dec. 31, 2012 Maximum [Member] Foreign [Member]	Dec. 31, 2012 Indefinite [Member] Foreign [Member]	Dec. 31, 2012 Finite [Member] Foreign [Member]
Operating loss carryforwards								$ 1,145.6	$ 587.6								$ 540.2	$ 47.4
Valuation allowance		205.5					16.0	16.2	173.3
Operating loss carryforwards, expiration date												2013	2013		2032	2027
Foreign tax credit carryforward		119.1	118.2							21.1
Tax credit carryforward, expiration year									2022				2013			2022
Estimated future taxable income to realize foreign tax credits		340.4							53.0
Estimated future taxable income to utilize deferred tax assets								1,230.8
Alternative minimum tax credit carryforwards									13.8
Valuation allowance, increase		10.6
Valuation allowance, increase foreign deferred tax asset		23.9
Valuation allowance, decrease federal deferred tax asset		(10.8)
Valuation allowance, decrease state deferred tax asset		(2.5)
Dividend on foreign earnings			169.6	169.6
Unremitted earnings not taxed		234
Non-cash income tax charge	22.0			22.0
Unrecognized tax benefits		138.4	127.2	126.3	57.5
UTB if recognized would impact the reported effective tax rate		90.6
UTB if recognized would impact the reported effective tax rate, net of federal benefit		88.1
UTB decrease due to statutes expiring		0.7	0.7	1.0		0.7
UTB increase due to uncertain tax positions		10.2	4.1	71.5		6.9
Interest and penalty exposure reported as accrued income tax		1.9
Years under examination											2007			2009
Statute of limitations expiration		Jun. 30, 2014
Future potential tax adjustments years											2007			2011
Deferred tax asset		578.5	595.6
Valuation allowances		205.5	194.9				4.9		15.7	15.7
Deferred tax asset, net		$ 373.0	$ 400.7							$ 5.4